energy

Question 1

Primary sector: where people take raw materials from the land and sea

farming, forestry, fishing, mining
Secondary sector: where people make or build things using raw materials which were got from the primary sector

food processing, manufacturing, assembling, building
Tertiary sector: where people are provided with a service by other people with certain skills

medicine, teachers, chefs, bankers
Quaternary sector: where people provide high level specialised skills to help people in other sectors

research, computer programming, financial management